Hi Allan & Shayne, Just for clarification osg::Fog doesn't quite minimic glFog, rather it just directly passes data to glFog at lets OpenGL fixed function pipeline for fog do the rest.
Robert. On Fri, Apr 10, 2009 at 6:48 PM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC <shayne.tuel...@hill.af.mil> wrote: > I'm not sure what you mean by "enable". If OSG mimics OpenGL state in the > way fog is done, exponential and linear fog modes are mutually exclusive. > You can render with one or the other, but not both. I would think that OSG > uses the same paradigm... > > -Shayne > > -----Original Message----- > From: osg-users-boun...@lists.openscenegraph.org > [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Allen > Saucier > Sent: Friday, April 10, 2009 10:27 AM > To: osg-users@lists.openscenegraph.org > Subject: [osg-users] FOG: applying both kinds at the same time. How? > > Hi, everyone!!javascript:emoticon(':)') I'm new to OSG and I am struggling > with applying both linear and exponential types of fog. > > Would someone mind showing me what I'm doing wrong? Thx for the help! I > really appreciate it. > > // Fog: Linear > osg::ref_ptr<osg::Fog> m_ofgFogLinear = new osg::Fog(); > m_ofgFogLinear->setMode(osg::Fog::LINEAR); > //m_ofgFogLinear->setDensity(0.001); // makes NO diff for linear > m_ofgFogLinear->setColor( osg::Vec4d(.75,.75,.75,0.0)); > m_ofgFogLinear->setStart(0.0); > m_ofgFogLinear->setEnd(5000.0); > > osg::ref_ptr<osg::StateSet> stateFogOn=new osg::StateSet(); > stateFogOn->setAttribute(m_ofgFogLinear.get(), osg::StateAttribute::ON); > stateFogOn->setMode(GL_FOG, osg::StateAttribute::ON); > stateFogOn->setMode(GL_BLEND, osg::StateAttribute::ON); > > //FOG state: exponential > osg::ref_ptr<osg::Fog> m_ofgFogExponential = new osg::Fog(); > m_ofgFogExponential->setMode(osg::Fog::EXP); > m_ofgFogExponential->setDensity(0.00005); > m_ofgFogExponential->setColor( osg::Vec4d(.75,.75,.75,0.0)); > osg::ref_ptr<osg::StateSet> stateFogExpOn=new osg::StateSet(); > stateFogExpOn->setAttribute(m_ofgFogExponential.get(), > osg::StateAttribute::ON); > stateFogExpOn->setMode(GL_FOG, osg::StateAttribute::ON); > > stateFogOn->setAttribute(m_ofgFogExponential.get(), > osg::StateAttribute::ON); > m_pognRoot->setStateSet(stateFogOn.get()); > > Isn't it possible to enable more than 1 attribute w/in a StateSet? I'm > trying to enable 2 types of fog w/in the same StateSet and it appears that > only one is actually in effect - the last one loaded. > ... > Allen > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=10084#10084 > > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
_______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
